post ovulation cramping

I am 4/5 dpo and have been feeling some on and off dull aching/cramping on the side I ovulated from. First positive opk was Friday and had another positive Saturday. I think I ovulated Sunday because I had a sudden sharp pain that quickly stopped. Has anyone felt cramping like this 4/5 dpo and gotten a bfp? I'm hoping it's my tubes moving a fertilized egg down to be implanted.